Native to Asia, Japanese knotweed is one of the 100 most damaging invasive species, as it reproduces vegetatively. A single stem fragment weighing less than a gram can form a new colony, and the rhizomes (underground stems) release inhibitors that hinder the growth of competitors.
- Features :
- Perennial plant reaching 2 to 3 m in height in summer
- Hollow bamboo-like stems
- Creamy white flowers at the end of the season
- What to do in the presence of buckthorn or European buckthorn? :
- Cut its stems flush with the ground, several times during the season and every year for several years.
- Don’t try to pull it out, as its rhizomes are very deep and you risk leaving fragments in the soil, encouraging its spread.
- Hire a specialist.